P0B66
Hybrid/EV Battery Voltage Sense I Circuit High
P0B66 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Voltage Sense I Circuit High. Common causes: battery voltage sensor fault, damage to the sensor circuit wiring harness. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- The hybrid system goes into emergency mode
- Reduced vehicle power
- Battery charging problems
- The car may not start
Causes
- Battery voltage sensor fault
- Damage to the sensor circuit wiring harness
- Short circuit in the circuit
- Battery control unit malfunction
- Problems with high voltage battery
How to Fix
- Check the condition of the high-voltage battery
- Check the integrity of the wiring harness and connections
- Check voltage sensor readings
- Test the battery control unit
- Replace faulty components
Related codes
Error P0B66 by Vehicle Brand
FAQ
What does the P0B66 code mean?
P0B66 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Voltage Sense I Circuit High
What causes a P0B66 error code?
The most common causes of P0B66 include: Battery voltage sensor fault; Damage to the sensor circuit wiring harness; Short circuit in the circuit; Battery control unit malfunction.
How do I fix a P0B66 diagnostic trouble code?
To fix P0B66: Check the condition of the high-voltage battery. Check the integrity of the wiring harness and connections. Check voltage sensor readings. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0B66?
Yes, but get it checked soon
How much does it cost to fix P0B66?
The estimated repair cost for P0B66 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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